Ever note, Lucilius,
  When love begins to sicken and decay
    It useth an enforced ceremony.
      There are no tricks in plain and simple faith;
        But hollow men, like horses hot at hand,
          Make gallant show and promise of their mettle;
            But when they should endure the bloody spur,
              They fall their crests, and like deceitful jades
                Sink in the trial.
 — William Shakespeare
  Ceremony